1 files changed, 153 insertions, 0 deletions
diff --git a/svx/source/engine3d/viewpt3d2.cxx b/svx/source/engine3d/viewpt3d2.cxx
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+++ b/svx/source/engine3d/viewpt3d2.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <svx/viewpt3d.hxx>
+
+Viewport3D::Viewport3D() :
+    aVRP(0, 0, 5),
+    aVPN(0, 0, 1),
+    aVUV(0, 1, 1),
+    aPRP(0, 0, 2),
+    eProjection(ProjectionType::Perspective),
+    aDeviceRect(Point(0,0), Size(-1,-1)),
+    aViewPoint (0, 0, 5000),
+    bTfValid(false)
+{
+    aViewWin.X = -1; aViewWin.Y = -1;
+    aViewWin.W =  2; aViewWin.H = 2;
+}
+
+// Set ViewWindow (in View coordinates)
+
+void Viewport3D::SetViewWindow(double fX, double fY, double fW, double fH)
+{
+    aViewWin.X = fX;
+    aViewWin.Y = fY;
+    if ( fW > 0 )   aViewWin.W = fW;
+    else            aViewWin.W = 1.0;
+    if ( fH > 0 )   aViewWin.H = fH;
+    else            aViewWin.H = 1.0;
+}
+
+// Returns observer position (PRP) in world coordinates
+
+const basegfx::B3DPoint& Viewport3D::GetViewPoint()
+{
+    // Calculate View transformations matrix
+    if ( !bTfValid )
+    {
+        double fV, fXupVp, fYupVp;
+        aViewPoint = aVRP + aVPN * aPRP.getZ();
+
+        // Reset to Identity matrix
+        aViewTf.identity();
+
+        // shift in the origin
+        aViewTf.translate(-aVRP.getX(), -aVRP.getY(), -aVRP.getZ());
+
+        // fV = Length of the projection of aVPN on the yz plane:
+        fV = aVPN.getYZLength();
+
+        if ( fV != 0 )
+        {
+            basegfx::B3DHomMatrix aTemp;
+            const double fSin(aVPN.getY() / fV);
+            const double fCos(aVPN.getZ() / fV);
+            aTemp.set(2, 2, fCos);
+            aTemp.set(1, 1, fCos);
+            aTemp.set(2, 1, fSin);
+            aTemp.set(1, 2, -fSin);
+            aViewTf *= aTemp;
+        }
+
+        {
+            basegfx::B3DHomMatrix aTemp;
+            const double fSin(-aVPN.getX());
+            const double fCos(fV);
+            aTemp.set(2, 2, fCos);
+            aTemp.set(0, 0, fCos);
+            aTemp.set(0, 2, fSin);
+            aTemp.set(2, 0, -fSin);
+            aViewTf *= aTemp;
+        }
+
+        // Convert X- and Y- coordinates of the view up vector to the
+        // (preliminary) view coordinate system.
+        fXupVp = aViewTf.get(0, 0) * aVUV.getX() + aViewTf.get(0, 1) * aVUV.getY() + aViewTf.get(0, 2) * aVUV.getZ();
+        fYupVp = aViewTf.get(1, 0) * aVUV.getX() + aViewTf.get(1, 1) * aVUV.getY() + aViewTf.get(1, 2) * aVUV.getZ();
+        fV = sqrt(fXupVp * fXupVp + fYupVp * fYupVp);
+
+        if ( fV != 0 )
+        {
+            basegfx::B3DHomMatrix aTemp;
+            const double fSin(fXupVp / fV);
+            const double fCos(fYupVp / fV);
+            aTemp.set(1, 1, fCos);
+            aTemp.set(0, 0, fCos);
+            aTemp.set(1, 0, fSin);
+            aTemp.set(0, 1, -fSin);
+            aViewTf *= aTemp;
+        }
+
+        bTfValid = true;
+    }
+    return aViewPoint;
+}
+
+void Viewport3D::SetDeviceWindow(const tools::Rectangle& rRect)
+{
+    aDeviceRect = rRect;
+}
+
+// Set View Reference Point
+
+void Viewport3D::SetVRP(const basegfx::B3DPoint& rNewVRP)
+{
+    aVRP = rNewVRP;
+    bTfValid = false;
+}
+
+// Set View Plane Normal
+
+void Viewport3D::SetVPN(const basegfx::B3DVector& rNewVPN)
+{
+    aVPN = rNewVPN;
+    aVPN.normalize();
+    bTfValid = false;
+}
+
+// Set View Up Vector
+
+void Viewport3D::SetVUV(const basegfx::B3DVector& rNewVUV)
+{
+    aVUV = rNewVUV;
+    bTfValid = false;
+}
+
+// Set Center Of Projection
+
+void Viewport3D::SetPRP(const basegfx::B3DPoint& rNewPRP)
+{
+    aPRP = rNewPRP;
+    aPRP.setX(0.0);
+    aPRP.setY(0.0);
+    bTfValid = false;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */